/** 
 * <p>Original Author:  jessefreeman</p>
 * <p>Class File: Decal.as</p>
 * 
 * <p>Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:</p>
 * 
 * <p>The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.</p>
 * 
 * <p>THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.</p>
 * 
 * <p>Licensed under The MIT License</p>
 * <p>Redistributions of files must retain the above copyright notice.</p>
 * 
 * <p>Revisions<br/> 
 * 	2.0  Initial version Jan 7, 2009</p>
 *
 */
 
 package camo.core.decal
{
	import flash.display.BitmapData;
	import flash.events.Event;
	import flash.geom.Matrix;
	import flash.geom.Rectangle;

	public class Decal extends CamoBitmap
	{
		
		public var source:Sheet;
		private var _cutOutRect:Rectangle;
		
		/**
		 * 
		 * @param source
		 * @param cutOutRect
		 * @param pixelSnapping
		 * @param smoothing
		 * 
		 */		
		public function Decal(source:Sheet, cutOutRect:Rectangle, pixelSnapping:String="auto", smoothing:Boolean=false)
		{
			this.source = source;
			this.source.addEventListener(Event.CHANGE, onSourceUpdate, false, 0, true);
			
			_cutOutRect = cutOutRect;
			var bmpData:BitmapData = this.source.sample(_cutOutRect);

			// Pass up null bitmap data becuase CamoAsset will cut out its own.
			super(bmpData, pixelSnapping, smoothing);
		}
		
		/**
		 * 
		 * @param e
		 * 
		 */		
		protected function onSourceUpdate(e:Event):void
		{
			e.stopImmediatePropagation();
			
			var oldW:Number = width;
			var oldH:Number = height;
			
			bitmapData = source.sample(_cutOutRect);
			
			// Restore previous width and height
			resizeBitmap(oldW, oldH);
		}
		
		/**
		 * 
		 * 
		 */		
		public function detach():void
		{
			source.removeEventListener(Event.CHANGE, onSourceUpdate);
			source = null;
			_cutOutRect = null;
		}
		
	}
}